package cn.tfyhyc.springcloud.controller;

import cn.tfyhyc.springcloud.entities.CommonResult;
import cn.tfyhyc.springcloud.entities.Payment;
import cn.tfyhyc.springcloud.service.PaymentService;
import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

/**
 * @author 头发又黑又长
 * @Date 2022/10/28 11:31
 * @email zwb15083976291@163.com
 */
@RestController
@Slf4j
public class CircleBreakerController {

    @Value("${service-url.nacos-user-service}")
    private String SERVICE_URL;

    @Resource
    private RestTemplate restTemplate;

    @RequestMapping("/consumer/fallback/{id}")
    //@SentinelResource(value = "fallback") //没有配置
    //@SentinelResource(value = "fallback",fallback = "handlerFallback") //fallback只负责业务异常
//    @SentinelResource(value = "fallback", blockHandler = "blockHandler") //blockHandler只负责sentinel控制台配置违规
//    @SentinelResource(value = "fallback", blockHandler = "blockHandler", fallback = "handlerFallBack")
    @SentinelResource(value = "fallback", blockHandler = "blockHandler", fallback = "handlerFallBack",
            exceptionsToIgnore = {IllegalArgumentException.class}) // <-----------忽略的异常，不执行 fallback方法
    public CommonResult<Payment> fallback(@PathVariable Long id) {
        CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL + "/paymentSQL/" + id, CommonResult.class, id);
        if (id == 4) {
            throw new IllegalArgumentException("IllegalArgumentException,非法参数异常....");
        } else if (result.getData() == null) {
            throw new NullPointerException("NullPointerException,该ID没有对应记录,空指针异常");
        }
        return result;
    }

    //本例是fallback
    public CommonResult handlerFallBack(@PathVariable Long id, Throwable throwable) {
        Payment payment = new Payment(id, null);
        return new CommonResult(444, "兜底异常handlerFallBack,exeception内容" +
                throwable.getMessage(), payment);
    }

    //本例是blockHandler
    public CommonResult blockHandler(@PathVariable Long id, BlockException blockException) {
        Payment payment = new Payment(id, "null");
        return new CommonResult<>(445, "blockHandler-sentinel限流,无此流水: blockException  " + blockException.getMessage(), payment);
    }

    @Resource
    private PaymentService paymentService;

    @GetMapping(value = "/consumer/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id) {
        return paymentService.paymentSQL(id);
    }

}
